1155198438480 has 40 divisors (see below), whose sum is σ = 3581115160032. Its totient is φ = 308052916864.

The previous prime is 1155198438421. The next prime is 1155198438481. The reversal of 1155198438480 is 848348915511.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 1155198438480.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155198438481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2406663174 + ... + 2406663653.

Almost surely, 2^{1155198438480} is an apocalyptic number.

1155198438480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1155198438480 is an abundant number, since it is smaller than the sum of its proper divisors (2425916721552).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1155198438480 is a wasteful number, since it uses less digits than its factorization.

1155198438480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4813326843 (or 4813326837 counting only the distinct ones).

The product of its (nonzero) digits is 5529600, while the sum is 57.

The spelling of 1155198438480 in words is "one trillion, one hundred fifty-five billion, one hundred ninety-eight million, four hundred thirty-eight thousand, four hundred eighty".